Maybe I misunderstood but if you want to add a button on each row, you can use display
property of the field. I created a dummy field and added the display property. Somthing like this:
...
Other: {
title: 'Other',
display: function (data) {
return '<b>test</b>';
},
create: false,
edit: false
}
...
However, if you wanted to add a general feature (i.e. single button for the table) , you can take a look at the toolbar
property.